Hot water boilers for solid fuels (with cooling loop)
nominal power 20 kW
Hot water boiler KTP 20 for combustion of fire wood, short piece wood, fresh saw dust, wet chips and other wet biomass. Another possible alternative fuel is brown and hard coal. The fuels can be mixed. Boilers comply with Class 4 in accordance with the Norm ČSN EN 303 – 5 EKODESIGN
Special construction of combustion chamber enabling double combustion, i.e. about 80% gasification and about 20% common burning out.
Boilers are a welded structure, inner plates 5 mm thick, outer walls 4 mm thick. All walls of the boiler body are doubled, filled with water, including the grate made of heat resistant pipes.
TECHNICAL DATA
| Boiler | |
| Nominal output | 20 kW |
| Min. output | 12 kW |
| Boiler width | 622 mm |
| Boiler height | 1193 mm |
| Boiler depth | 550 mm |
| Grate depth | 350 mm |
| Chimney height | 1086 mm |
| Chimney diameter | 159 mm |
| Height of water inlet | 293,5 mm |
| Diameter of water inlet and outlet | 2″ |
| Max. diam./length of wood | 200/ 330 mm |
| Volume of combustion chamber | 47,9 l |
| Boiler weight | 261 kg |
| Boiler class in accordance with Norm EN 303-5 | 4 |
| Efficiency | 85,1% |
| Energy efficiency class | C |
| Energy Efficiency Index (EEI) | 79 |
| Seasonal energy efficiency | 79 % |
| Boiler emissions according to Commission Regulation (EU) No. 2015/1189 | EKODESIGN |
| Flow rate of burnt gas – nominal output | 146 m³/h |
| Hydraulic boiler loss | 0,4 mbar |
| Burning time for nominal output | 4 h |
| Size of loading hatch, semicircle – width x height | 245×230 mm |
| Water volume | 98 l |
| Max. operation water overpressure | 2 bar |
| Min. operation water overpressure | 0,5 bar |
| Testing water overpressure | 4 bar |
| Max. operation temperature | 90 °C |
| Specified chimney draught | 14 Pa |
| Wood consumption for nominal output | 6,4 kg/h |
| Temperature of burnt gas for nominal output | 265 °C |
| Consumption of brown coal for nominal capacity | 3,8 kg/h |
| Min. Storage tank | 800 l |
guarantee for the tightness of boiler body 3 years
- guarantee for the tightness of boiler body 3 years
- possibility to burn all kinds of solid fuels
- possibility to burn wet wood, wet biomass and other solid fuels in manual operation
- boilers are designed for low chimney draught 10 – 12 Pa
- boilers include a cooling loop as a protection against overheating
- the boiler output can be adjusted and its service capacity reduced by 40% without any additional devices
- the return water can drop up to 40°C because it goes through the pipe grate near the fire place
This boiler KTP 20 with manual loading can be completed with a high quality pellet burner and changed to an automatic boiler KTP 20 PELLET.
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